Water wastage in Water too little to waste – Class 7 Science Experiment

Chapter Name: Water too little to waste

Activity Name: Water wastage in Water too little to waste

Activity Description:

This experiment demonstrates how seeds are dispersed in nature to ensure the survival and growth of plants in different environments.

Required Items:

1. A variety of seeds (e.g., maple, dandelion, coconut, etc.)
2. Fan or hairdryer
3. Water spray bottle
4. Paper or cardboard
5. Open space for conducting the experiment

Step by Step Procedure:

1. Collect different types of seeds that have different methods of dispersal. For example, maple seeds have wings for wind dispersal, dandelion seeds have a parachute-like structure, and coconut seeds can float in water.
2. Set up an open space for the experiment, preferably outdoors or in a well-ventilated area.
3. Label each type of seed and place them on a paper or cardboard sheet.
4. Use the fan or hairdryer to simulate wind dispersal. Position the seeds in front of the fan and observe their movement.
5. Use the water spray bottle to simulate water dispersal. Spray water gently on the seeds and observe how they react.
6. Note down your observations and compare the methods of dispersal among different seeds.

Experiment Observations:

• Maple seeds: They spin and glide through the air, covering a significant distance from the parent tree.
• Dandelion seeds: They float in the air, carried away by the slightest breeze.
• Coconut seeds: They float in water, aiding dispersal through water bodies.

Precautions:

1. Handle the seeds carefully to avoid damage.
2. Conduct the experiment in a safe area to prevent any hazards.
3. Use the fan and water spray bottle responsibly and avoid causing harm to living organisms nearby.

Lesson Learnt from Experiment:

The experiment helps students understand the diverse ways seeds are dispersed by nature, ensuring their distribution to suitable environments for germination and growth. Seed dispersal mechanisms are essential for maintaining biodiversity and ecological balance.